I love new music, but I am impatient when it comes to sifting through the crummy tracks to find the jems. Luckily, the magical computer interwebs arrive again to save the day. thesixtyone.com lets you (or everyone else) do the sifting, then the songs with the most votes get bumped up the list, so you can tell which songs are more likely to be good.
Combine it with emusic.com or another download service and you've got yourself some great free/cheap music action. Thank you Internet!